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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: SimpleItem.html 689 2013-06-28 19:22:16Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.vaadin;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.vaadin.data.Item;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.vaadin.data.Property;<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.Collection;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.Collections;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.HashMap;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.Map;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.Set;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>/**<a name="line.19"></a>
<span class="sourceLineNo">020</span> * Simple read-only {@link Item} implementation backed by a Java object.<a name="line.20"></a>
<span class="sourceLineNo">021</span> *<a name="line.21"></a>
<span class="sourceLineNo">022</span> * &lt;p&gt;<a name="line.22"></a>
<span class="sourceLineNo">023</span> * Item {@link Property}s are defined by {@link PropertyDef}s and retrieved by a {@link PropertyExtractor}.<a name="line.23"></a>
<span class="sourceLineNo">024</span> *<a name="line.24"></a>
<span class="sourceLineNo">025</span> * @param &lt;T&gt; the type of the underlying Java object<a name="line.25"></a>
<span class="sourceLineNo">026</span> * @see SimpleContainer<a name="line.26"></a>
<span class="sourceLineNo">027</span> * @see SimpleProperty<a name="line.27"></a>
<span class="sourceLineNo">028</span> */<a name="line.28"></a>
<span class="sourceLineNo">029</span>@SuppressWarnings("serial")<a name="line.29"></a>
<span class="sourceLineNo">030</span>public class SimpleItem&lt;T&gt; implements Item {<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>    private final T object;<a name="line.32"></a>
<span class="sourceLineNo">033</span>    private final Map&lt;String, ? extends PropertyDef&lt;?&gt;&gt; propertyMap;<a name="line.33"></a>
<span class="sourceLineNo">034</span>    private final PropertyExtractor&lt;? super T&gt; propertyExtractor;<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span>    /**<a name="line.36"></a>
<span class="sourceLineNo">037</span>     * Constructor.<a name="line.37"></a>
<span class="sourceLineNo">038</span>     *<a name="line.38"></a>
<span class="sourceLineNo">039</span>     * @param object underlying Java object<a name="line.39"></a>
<span class="sourceLineNo">040</span>     * @param propertyDefs property definitions<a name="line.40"></a>
<span class="sourceLineNo">041</span>     * @param propertyExtractor extracts the property value from {@code object}<a name="line.41"></a>
<span class="sourceLineNo">042</span>     * @throws IllegalArgumentException if any parameter is null<a name="line.42"></a>
<span class="sourceLineNo">043</span>     */<a name="line.43"></a>
<span class="sourceLineNo">044</span>    public SimpleItem(T object, Collection&lt;? extends PropertyDef&lt;?&gt;&gt; propertyDefs, PropertyExtractor&lt;? super T&gt; propertyExtractor) {<a name="line.44"></a>
<span class="sourceLineNo">045</span>        this(object, SimpleItem.buildPropertyMap(propertyDefs), propertyExtractor);<a name="line.45"></a>
<span class="sourceLineNo">046</span>    }<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>    /**<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * Constructor used when the mapping from property name to {@link PropertyDef} is already built.<a name="line.49"></a>
<span class="sourceLineNo">050</span>     *<a name="line.50"></a>
<span class="sourceLineNo">051</span>     * @param object underlying Java object<a name="line.51"></a>
<span class="sourceLineNo">052</span>     * @param propertyMap mapping from property name to property definition<a name="line.52"></a>
<span class="sourceLineNo">053</span>     * @param propertyExtractor extracts the property value from {@code object}<a name="line.53"></a>
<span class="sourceLineNo">054</span>     * @throws IllegalArgumentException if any parameter is null<a name="line.54"></a>
<span class="sourceLineNo">055</span>     */<a name="line.55"></a>
<span class="sourceLineNo">056</span>    public SimpleItem(T object, Map&lt;String, ? extends PropertyDef&lt;?&gt;&gt; propertyMap, PropertyExtractor&lt;? super T&gt; propertyExtractor) {<a name="line.56"></a>
<span class="sourceLineNo">057</span>        if (object == null)<a name="line.57"></a>
<span class="sourceLineNo">058</span>            throw new IllegalArgumentException("null object");<a name="line.58"></a>
<span class="sourceLineNo">059</span>        if (propertyMap == null)<a name="line.59"></a>
<span class="sourceLineNo">060</span>            throw new IllegalArgumentException("null propertyMap");<a name="line.60"></a>
<span class="sourceLineNo">061</span>        if (propertyExtractor == null)<a name="line.61"></a>
<span class="sourceLineNo">062</span>            throw new IllegalArgumentException("null propertyExtractor");<a name="line.62"></a>
<span class="sourceLineNo">063</span>        this.object = object;<a name="line.63"></a>
<span class="sourceLineNo">064</span>        this.propertyMap = propertyMap;<a name="line.64"></a>
<span class="sourceLineNo">065</span>        this.propertyExtractor = propertyExtractor;<a name="line.65"></a>
<span class="sourceLineNo">066</span>    }<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span>    /**<a name="line.68"></a>
<span class="sourceLineNo">069</span>     * Retrieve the underlying Java object.<a name="line.69"></a>
<span class="sourceLineNo">070</span>     *<a name="line.70"></a>
<span class="sourceLineNo">071</span>     * @return underlying Java object, never null<a name="line.71"></a>
<span class="sourceLineNo">072</span>     */<a name="line.72"></a>
<span class="sourceLineNo">073</span>    public T getObject() {<a name="line.73"></a>
<span class="sourceLineNo">074</span>        return this.object;<a name="line.74"></a>
<span class="sourceLineNo">075</span>    }<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span>    @Override<a name="line.77"></a>
<span class="sourceLineNo">078</span>    public SimpleProperty&lt;T, ?&gt; getItemProperty(Object id) {<a name="line.78"></a>
<span class="sourceLineNo">079</span>        PropertyDef&lt;?&gt; propertyDef = this.propertyMap.get(id);<a name="line.79"></a>
<span class="sourceLineNo">080</span>        if (propertyDef == null)<a name="line.80"></a>
<span class="sourceLineNo">081</span>            return null;<a name="line.81"></a>
<span class="sourceLineNo">082</span>        return this.createSimpleProperty(propertyDef);<a name="line.82"></a>
<span class="sourceLineNo">083</span>    }<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>    @Override<a name="line.85"></a>
<span class="sourceLineNo">086</span>    public Set&lt;String&gt; getItemPropertyIds() {<a name="line.86"></a>
<span class="sourceLineNo">087</span>        return Collections.unmodifiableSet(this.propertyMap.keySet());<a name="line.87"></a>
<span class="sourceLineNo">088</span>    }<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span>    /**<a name="line.90"></a>
<span class="sourceLineNo">091</span>     * @throws UnsupportedOperationException always<a name="line.91"></a>
<span class="sourceLineNo">092</span>     */<a name="line.92"></a>
<span class="sourceLineNo">093</span>    @Override<a name="line.93"></a>
<span class="sourceLineNo">094</span>    public boolean addItemProperty(Object id, Property property) {      // TODO: VAADIN7<a name="line.94"></a>
<span class="sourceLineNo">095</span>        throw new UnsupportedOperationException();<a name="line.95"></a>
<span class="sourceLineNo">096</span>    }<a name="line.96"></a>
<span class="sourceLineNo">097</span><a name="line.97"></a>
<span class="sourceLineNo">098</span>    /**<a name="line.98"></a>
<span class="sourceLineNo">099</span>     * @throws UnsupportedOperationException always<a name="line.99"></a>
<span class="sourceLineNo">100</span>     */<a name="line.100"></a>
<span class="sourceLineNo">101</span>    @Override<a name="line.101"></a>
<span class="sourceLineNo">102</span>    public boolean removeItemProperty(Object id) {<a name="line.102"></a>
<span class="sourceLineNo">103</span>        throw new UnsupportedOperationException();<a name="line.103"></a>
<span class="sourceLineNo">104</span>    }<a name="line.104"></a>
<span class="sourceLineNo">105</span><a name="line.105"></a>
<span class="sourceLineNo">106</span>    // This method exists only to allow the generic parameter &lt;V&gt; to be bound<a name="line.106"></a>
<span class="sourceLineNo">107</span>    private &lt;V&gt; SimpleProperty&lt;T, V&gt; createSimpleProperty(PropertyDef&lt;V&gt; propertyDef) {<a name="line.107"></a>
<span class="sourceLineNo">108</span>        return new SimpleProperty&lt;T, V&gt;(this.object, propertyDef, this.propertyExtractor);<a name="line.108"></a>
<span class="sourceLineNo">109</span>    }<a name="line.109"></a>
<span class="sourceLineNo">110</span><a name="line.110"></a>
<span class="sourceLineNo">111</span>    private static Map&lt;String, PropertyDef&lt;?&gt;&gt; buildPropertyMap(Collection&lt;? extends PropertyDef&lt;?&gt;&gt; propertyDefs) {<a name="line.111"></a>
<span class="sourceLineNo">112</span>        HashMap&lt;String, PropertyDef&lt;?&gt;&gt; map = new HashMap&lt;String, PropertyDef&lt;?&gt;&gt;(propertyDefs.size());<a name="line.112"></a>
<span class="sourceLineNo">113</span>        for (PropertyDef&lt;?&gt; propertyDef : propertyDefs)<a name="line.113"></a>
<span class="sourceLineNo">114</span>            map.put(propertyDef.getName(), propertyDef);<a name="line.114"></a>
<span class="sourceLineNo">115</span>        return map;<a name="line.115"></a>
<span class="sourceLineNo">116</span>    }<a name="line.116"></a>
<span class="sourceLineNo">117</span>}<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>




























































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